Hogan would have to have a defined role
Hell, I say bring him in as someone who BOUGHT out Jeff Jarrett
And have him and foley in the GM kind of thing... And slowly make it "is he on the MEM" side or not
Everyone will assume he is but have it not so.
U could do the whole angle where Hogan is the guest ref and Angle accidentally knocks him out and then it kind of goes and goes from there culminating in an Angle/Hogan feud.
After that, u could have them working together all along or keep Hogan face.