Depends on if Edo Madara manages to stick around or is brought back from the pure world. If he does, I don't see Tobi sticking around to be FV.
Tobi has always been a lack luster FV (to me). He was hang around the manga nonchalantly while being nonthreatening for far to long while he let others do achieve his goal. Now that he is engaged in battle, it doesn't feel like he is "cut from the same cloth" as other villains. Other villains felt more exciting when they engaged in battle. Tobi was introduce as joke and remains rather a bore. Maybe that will change when he finally engages in battle. For one thing, he could use Edo Madara personality.