Well if they continue to just put all their eggs in one basket it's not going to help them at all when he gets sidelined. They need to promote all these 'stars of tomorrow' that we assume are going to rise up, throughout 2009.
Relying on HHH, Cena and Batista and to a lesser extent Mysterio to sell all their merchandise is no good if Batista and Rey quit (as rumours and reports suggest) and then Cena gets hurt.
If they continue like they are on Raw especially (Smackdown and ECW nowhere near as much), then all they really have is Cena, Rey, and HBK to sell merch for the kids and younger viewers thoughtout the majority of 2009.
But Cena sold a shitload of merchandise in 2008 whilst being injured for many months in the year, so getting injured again most likely wouldn't hurt mechandise sells at all.
Other guys need to get the Cena style pushes so that the fans have more guys to support rather than buy the same 6 guys' merchandise and then maybe give a crap about the lower guys, which sums up 2008 all over. Only 3 guys got pushed last year and that was Kofi, Punk and Jericho, and now 2 of them are doing nothing of merit really, and Jericho is heel, so he won't be selling tons of merch.
The names Jeff and Matt Hardy ring a bell. I'm sure they were pushed in 2008. I heard they are good merchandise sellers too. And I doubt they will quit anytime soon.