Of course he's gonna say that his fighters are gonna "devour" the UFC fighters. He's the Pride president, and is trying to hype up the fights. Just as I am sure Dana White would say all of his fighters are gonna win.
As for Killerinstinct saying that Chuck is gonna knock Wanderlei the fuck out, that's all speculation. Each one has an equal chance to win the fight. I'd say Wand is the slight favorite as far as odds go though.
Of course Pride isn't gonna win all the titles. But they could definitely take the HW, LHW, and LW. Middleweight and Welterweight will be tougher IMO.