Well, what exactly is your plot so far anyway? It's hard to give suggestions when we don't know what kind of lead up your planning on.
It's still in the rough stages, but here is a very very very rough draft:
You meet a man in Seyda Neen who is having stange visions of the future. (Involving the Oblivion Crisis, the fall of the Ministry of Truth, the Sucessions, and Umbriel) He knowing you're the Nerevarine wants you to help him. If you take this quest before you're the Nerevarine, he'll simply say that there's something in you that he trusts, so he asks you to help him. He needs you to collect artifacts (or do something of equal importance) to make your own plane of Oblivion. Along the way while gathering these artifacts or doing whatever it is you need to do, you learn about some ill effects that may happen if you continue. Once you have everything, he'll ask if you're ready. If you are, the process will begin. You'll be in a white abyss of nothingness. (Well, nothing but you and him) This is your new plane. After a short conversation you learn that the plane is unstable and will collapse. The plane collapses and you are teleported back to Vvardenfell where you see the eighth (or seventh, correct me if I'm wrong) tower (which has just been formed due to that(, which will act as Martin's dragon statue did, preventing a daedric invasion. This means that the Mythic Dawn's plans are foiled, thus no Oblivion Crisis, thus Vivec isn't taken so the Ministry doesn't fall, and with no Crisis or falling of the Ministry, the events from Oblivion up the Infernal City (and presumably the second novel) can't happen, thus Tamriel is saved.
It's still in the very very early planning stage, but I quite like it, myself.