It depends on whether any of those other teams have eligible ISC or NSW Cup players they can call on.
The key for the Warriors was that they were able to bring in Solomone Kata and Tuimoala Lolohea from NSW Cup and they really gave the Warriors a boost during the finals series.
If the Warriors decided they wanted to go back to back, they could call in Lolohea, Niukore, Hingano and Tevaga and they would make a huge difference. Also I don't know where they are but Sipley and Roache would also be handy additions.
Personally, I'm tipping the Cowboys to go all the way. Of course anything and everything happens in the NYC but I think the addition of Ponga was the last piece of the puzzle for them, I think they'll blitz a rudderless Brisbane during the first week (thanks Fox Sports for delaying that till 7:30am on Sunday...) and that should carry them.
I'll be very interested to see how Manly go with Trbojevic playing for them full-time. For my money, he's been the best NYC player this year and I think his inclusion could really rattle the finals make-up.