I disagree as there is a distinction between the two. To our knowledge only two Septim emperors ever went to High Hrothgar. If all the emperors were as blessed as Tiber was (aka Dragonborn) then the Greybeards would have called them and we would have had many shout wielding emperors. We don't have that though. The only possible reason is that, while all the emperors were blessed by the Divines, not all were Dragonborn.
Regardless I doubt Bethesda will make our character emperor as they would have to make a canon Dragonborn.
Not really. Your character wasn't called until you killed a dragon. Before that moment the Greybeards probably didn't even know you existed. I don't know why they summoned Talos, perhaps he killed a dragon too. After all they were around back then.
About your earlier point (hard to quote cause you wrote in the part where you quoted me) You are right that being a dragonborn is an advantage to claiming the throne, certainly but it's not an entitlement. If the Amulet of Kings was still around it might have been because you could wear it where nobody else could. Now it's just helpfull.
No more than they've had to have a canon Nerevarine, or champion of cyrodiil. But I mean they already have a canon dragonborn. He's a nord male.
What's this guys name? How does he look, like in the trailer? Does he become a vamp or a dawnguard in the expansion, which side of the civil war did he choose? What guilds did he join? How far did he get? What diseases does he have? What are his religious believes?
Besides the person you see is for the trailor not the actual dragonborn.
Yes the amulet was destroyed, but there are other ways to prove you are dragonborn. The dragonborn does have the dragonblood, as do all his/her heirs. The emperors all had the dragonblood, they just couldn't learn shouts, because they weren't dragonborn (except Tiber Septim in the Septim Line); they just had the right to the throne. As the dragonborn, you have the dragonborn and all the rights to the throne. Pretty much dragonborns have the dragonblood, but heirs with the dragon blood might not have the gift of the dragonborn, but both have claims to the throne.
I promise you dragonborn and dragonblood are the same thing.
"Akatosh, looking with pity upon the plight of men, drew precious blood from his own heart, and blessed St. Alessia with this blood of Dragons, and made a Covenant that so long as Alessia's generations were true to the dragon blood, Akatosh would endeavor to seal tight the Gates of Oblivion, and to deny the armies of daedra and undead to their enemies, the Daedra-loving Ayleids." Those blessed by Akatosh with "the dragon blood" became known more simply as Dragonborn"
Extract from http://www.uesp.net/wiki/Skyrim:The_Book_of_the_Dragonborn
Akatosh seems to make a link here between being Dragonborn or of dragonblood and having the right to rule, but without the dragonfires there is no real reason for them to rule over anything and Akatosh has made dragonborns before that did not end up ruling over all of Tamriel or even Cyrodiil or another individual province. So you have no real right to rule. You just have a nice addition to your claim because you are dragonborn and thus blessed by Akatosh who is the chief god of the Imperial religion, but it does not actually make you dragonborn. Or would every Shezzarine have been allowed to rule over the Third Empire also because they are aspects of Talos?
No it wouldn't. To paraphrase the Orc librarian in the arcaneum, "Everything is true with Elderscrolls. Even the falsehoods. Especially the falsehoods."
Yes it would. TES takes a great deal of care to make sure that nobody can ever identify the hero of a previous game as it wouldn't make sense. My Nerevarine for instance would not have allowed the destruction of Morrowind, the moon would have kept floating. The Argonian invaison would have been stopped. Helseth would have been killed. Ald'Ruhn would have survived the oblivion crisis and I can promise you that no matter what would have happened Vivec would still be sitting on his throne being worshipped like a god, with me on his side.
Bethesda however simply wrote out the Nerevarine, no canon ending. The same happened to the CoC. We have no idea what happened after the events of SI and that's okay, maybe he or she died returned to the Isles and ruled there or maybe he just ate a lot of cheese for a great many years. Again this is not set in stone. The only canon things are that those hero's have dissapeared.
To me, the real question here is, "Who is going to tell the Dovahkiin that he can't be Emperor?"
Seriously, should he or she make the claim, who do you think is going to get in the way? I'll tell you who: Bethesda, and ONLY Bethesda.
Their game, their rules, their emperor.
Period. ("full stop" for you Brits)
Or you know, the Imperial legion... Sure you are powerful in this game, but dragons can be killed even without you and an entire legion marching directly towards you would be a rather hard thing to kill even for soembody as powerful as the Dragonborn. One can not claim the throne on his or her own, so without political and military support the dragonborn is useless.