I think this is just the dream of a fanboy who hates Hogan (and yes, I think Abyss sucks as well). Joe more than likely will not replace Abyss.
Hogan's an old school guy, and this is an old school angle. Abyss gets hit by car. Abyss finds the strength deep within his soul, blah blah blah. Makes a brave return, just a week later, to help Team Hogan get the big win.
I think that's the way this is being set up. This could be a last ditch effort by Hogan to get Abyss over as the top babyface in TNA. Will it work? No. As if Abyss didn't have enough problems before, he now looks like Hogans toy. But then again, how does this not work? Abyss gets huge pops in the impact zone, and that translates well to television (even though there are less than 1,000 people in that place). We are the only ones really bitching about Abyss.
I hope Joe comes back, kicks ass, etc. But I just don't think Hogan and company have any reason, right now, to give up on Abyss. I don't like what they're doing with him, and neither do a lot of you. But I highly doubt Hogan pays attention to the IWC. I think Abyss makes a big return (ok, it's not big, but to Hogan it is), and takes out Team Flair...Hulk Hogan style.