Not only do i not see such a thing happening,quite frankly i find it silly.
A gimmick asked for countless times,and a terribly 'been there done that' one.
Dragons in a game and we wanna ride them?Like THAT's never been done before...
As far as i know the Dragonborn is still a DragonSLAYER,not a DragonRIDER.
This goes against everything the idea is about.
ANd go and find me one sentence in TES lore that speaks of the Dragonborn RIDING dragons.
Its a silly mainstream fantasy childhood dream feature that simply dosnt fit in.
It would be nice if they implemented features that are highly popular in demand,but not farfetched ones like this.
Cuz if we're going THAT way then i demand a Boob & butt slider in the character gen so i can make a sassy chick.
Wanna bet how popular that'd be?