According to Bethesda...

Do you think any of them might surpass the size of Shivering Isles..and just have Bethesda do another, BAT[censored] CRAZY, lets throw everything to a wall and hope it sticks approach?

I'd don't think it has to surpass SI....
I mean if you take four big ones and combine them, then we have something much larger than SI!

Where'd they say that?

I would be very happy with two more DLC's if they were both at least dawnguard size or if one was massive like shivering isles and the other was a cheap one that added a bunch of new mechanics to the base game like hearthfire.

I really liked Dawnguard and hearthfire and I really like what I hear about dragonborn (on PC) given the trend I expect both to be mid sized like the to major DLC's they did so far since thats what they did with FO3 and new vegas.

I would yell "shut up and take my money" if they did a cheap expansion that did nothing but add new spell, potion, enchant and shout mechanics to the game for like 5 dollars even if it didnt include spell making. *hint hint*

I'd yell that with you.