I think Dana will throw a shed load of money at a big name to fight Aldo here and use Siver/Nunes winner as a back up plan.
Hioki, Piorier and KZ wont be ready. And Aldo facing Nunes or Siver is just not very exciting for a main event of a PPV.
Someone like Tatsuya Kawajiri who has fought for SF LW title and is 2-0 against top competition since dropping to FW would be so easy to market.
On this card i'm also expecting to see Phil Davis Vs Machida, Jon Fitch, Boeck and Rory Mac if he can get a quick turn around.