It's one thing for the Tikis to stick around and another for them to join the Kremling army. I like
Diddy Kong
's idea of them being relegated to the Lost World. That would actually be very cool. You think now that the Krems are back, the Tikis are history and then, bam, there they are! Rare ideas and Retro ideas, living together, mass hysteria! Oh, maybe Tiki Tong gets a rematch in the Crocodile Core analogue!
Also, I have to vouch again for the forest totems. I love those. Tippin' Totems is one of my favorite levels of DKC Returns. They're as important a part of DK Island's forest as the rope bridges and Ewok houses (to me, anyway).