I'm not a Hogan hater like lots of people are around here, but I don't believe he is worth the money that he gets - especially while TNA are reportedly having financial troubles.
That said, if Hogan goes I would still like to see Bischoff stay.
Agreed, I don't hate him like a lot of people do here, but he is a double-edged sword.
Yes, he gets a huge pop at the live shows and he opens a lot of marketing/promotional doors (when they hit the UK he's all over the mainstream daytime chat shows etc - there's no way they'd get anyone else in, even Angle or Sting, because they just don't have the star power of HH to a mainstream TV audience). He may also add a bit of attraction to the casual fan who stumbles across TNA for the first time and only carries on watching because he's there. And don't underestimate this, as that's what happened to me. I saw an episode and saw Hulk and Steiner and Sting and thought, "Oh, this isn't just some cheap rassling show, it's got name guys in it. I'll watch it for a bit and see if it's any good." Admittedly, it was the X Division that made me a fan but it was the old WCW guys who caught my eye and stopped me flipping the channel in the first place.
Then again, he has a lot of downsides, too. He's expensive. There might be personal issues between him and Dixie/other TNA management. There is no actual evidence of him increasing attendances, ratings etc. And his presence could be a negative thing. People might tune in, see Hulk and think, "What? This company has that old fart in it! I thought he'd retired! What a two bit operation!" After all, when Juggalo Championship Wrestling announces a main event between Roddy Piper and Terry Funk, do you think, "Wow, they have a big name main event!" or do you think, "Wow, they're really dredging the barrel with guys who are years past their prime." It cuts both ways.
Not a Hulk-hater, but I think he should go. I'd like to see a new start and a fresh direction from TNA.