Who will/should replace edge as top face on Smackdown?

Mysterio.

Randy Orton.

Christian, however that's more hope for the long term, even though I can see him taking Edge's spot against Del Rio.

Rey, but how long has he got left in him, also? I wouldn't be all that surprised if Orton gets drafted over to SmackDown sometime later this year, but I think they might run with Christian for a little while, but I don't expect him to become World Champion by any means. I think Del Rio will be the Champion with Christian chasing for a little while, unless they wanted to promote the Rey - Cody feud and add them to the mix too.

Randy Orton does appear to be the most obvious choice.

Mysterio. They could also shuffle Mistico while it's early.

Nobody can replace Edge. End of.

Who should they put on Smackdown in his place? Orton/HHH should go over.

I've sadi recently the WWE needs a big draft with a mass shake up of the rosters, so this is the best time to do it. Move people abot and even out the brands again. For now the only face Samckdown has is Rey. He's a great guy but can't carry the brand himself. The other guy is Taker but he isn't a full schedule guy anymore so they need one or two solid full tiem faces over there.

Christian will take his place for now no doubt for Extreme Rules. After that...who knows?