Brock Lesnar!

Well due to his illness if he's going to return it'll be on a 6 month basis

why cant he return next week 2 make a promo?

He could but he's still under contract to the UFC so it's highly unlikely.

It's Jericho despite him saying he's gone to canada for the week

After reading brocks book i would be very shocked if he ever did return. Then again in his book he just came over as a stupid idiot who believes he should always get what he wants when he wants it

From Wiki:

In the summer of 2011 Lesnar announced that he was ready to get back into the Octagon, stating that "I feel like a new man, healthy, strong, I feel like I used to feel."

Lesnar fought at UFC 141 on December 30 in Las Vegas, where he was defeated via TKO at 2:26 in the first round by former Strikeforce heavyweight champion Alistair Overeem. After the defeat, Lesnar subsequently announced his retirement from MMA.

I know he has retired, but he has more than enough money to retire and live happy with his wife and kids

One of Lesnars main reasons for leaving was because of the WWE schedule being too hectic. I doubt that's changed in the few years he's been gone.

He could do occasional ppv like Hogan did, and Rock does now.

Yes he has money but also an ego that might need feeding soon.