This is better placed in a different forum.
Sure, your Oblivion character could still be alive, provided he/she is a vampire or a very powerful mage.
Spoiler Or if he/she became the Madgod.
If it's the latter, then it wouldn't make sense for your character to appear, and it's generally assumed that the CoC is the same as the one who participated in the events of the SI.
EDIT: Also, I'd just like to add that including the player-character from past games directly in new games would just be the worst idea ever. Sorry. Every character is unique and I don't see any possible way to include it in any reasonable format. A descendant is just as bad. My character did not have children. My Oblivion main character is dead. It's best not to make any assumptions about the player character. Ever.
Well I can't judge your opinions but I can disagree with your statement that having the player-character carry over to other games has no reasonable format. My character is the "other-half" of my real life friend's character (we both have played all four TES games) and his character was created by Julianos and solved the main quest in Daggerfall but was killed by Numidium. Then his character was created again for the TESIII story, and my character was created by the Daedra as well for the TESIII story. In short, Akatosh split the Mundus into two dimensions overlapping one another. Both my character and my friend's character killed Dagoth Ur and solved the Morrowind main quest, but in separate dimensions of the Mundus. So it's like there are two Mundus'.
My friend's player-character solved the TESIV main quest storyline (an anonymous NPC did the Shivering Isles questline). My player-character had nothing to do with the TESIV game (mostly because I just flat out don't like TESIV). My friend's player-character found a way to cross over to the "other half" of Mundus in the TESIV story. When this happened, Akatosh & his Jills repaired time and the Mundus, sealing it back to the single dimensional plane that it was. Both player-characters are the historical Nerevarine (but only my character is the Nerevarine in her dimension since my friend's character didn't exist in my dimension of Mundus) but only my friend's character is the Champion of Cyrodiil. My character, shortly after the TESIV story, learns how to prolong elvish lifespan (just like Divath Fyr) and since she is close friends with my real life friend's player-character, she lets her in on the secret and they both can prolong their lives. Now I'm not sure how long my friend's character will live because he might want to use a different character for when TESV Skyrim comes out. If that's true, then I'll just have her killed off in my fanfic that I'm writing. But I still use my same character. And since my player-character learned to prolong her life, she'll also be in the TESV Skyrim storyline.
So you see,
Velorien, you can carry over the same player-character from game to game. You just have to be crafty about it.
Exactly. I even think it's a step too far that they've implied that the Nerevarine went to Akavir. My Nerevarine didn't. Mine went to Cyrodiil and got murdered there. But the few times that the series gives any form of description of the heroes of each game, it can usually be dismissed with simple hand waving. My Nerevarine told people she was going to Akavir to keep her real motives in Cyrodiil a secret.
Ah, but see, here is where you can say "that was a rumor that was created". That's what I say in my fanfic. My character goes back to Summerset Isle where she was born and raised (even though she is a Dark Elf). And when she does go back to Shimmerene, Summerset Isle, boasting about how she saved the land of Morrowind from the evil Dagoth Ur and the Blight disease, everyone thinks she's lying because "the neravarine went to Akavir". And thus, my character is slowly reverted back to the normal person that she was, except her stats are high and all. But I can always work my way around that in story-telling.
And just to clarify, the CoC doesn't have to become the madgod. Any worthy person could have went into the SI gate and solved the SI mainquest and became the new madgod.
Yep. My Champion of Cyrodiil did at least. Some people's characters might not have though, so in that case I hope Bethesda doesn't have anyone blatantly say, "The Champion of Cyrodiil went to the Shivering Isles after the Oblivion crisis and became the new Prince of Madness!"
Who would really know about that anyway, besides the PC and Haskill, etc.?
If it were to be posted, it'd be posted on The Imperial Library. And I certainly hope they do so we can clarify it once and for all as to what really happened.