When I first played Returns, I had no Kremling bias, and didn't care much about the series then. However, I always thought the tikis were really uninspired and seemed a bit out of place. Possibly them being inanimate objects (wood and instruments) being animated also may have rubbed me the wrong way.
To be fair, it is good that the Tikis were very much their own thing. As everyone could notice, the Snowmad were a... "homage" to the Kremlings (putting it nicely). I also did enjoy the hypnosis stuff, as it did leave to some hilarious and great moments (that opening where a Tiki tries to hypnotize and control Donkey Kong LOL), Still, I couldn't bring myself to care about the tikis. I guess the only reason why I enjoyed the Snowmads more was because they were more expressive overall and were easier to relate to. I actually somewhat wanted to beat the crap out of the Snowmads; the tikis left me feeling nothing toward them.
When it comes to Tiki Tong, I think most people's problem with him is his boss fight, and less about him. I was more disappointed with the fact that you never really fight that Colossal Tiki that you enter to fight Tiki Tong, whom I was convinced was going to be the final boss fight.
However, I really did enjoy the before fight/after fight cinematics with the bosses from the Tikis. Very disappointed Tropical Freeze bosses had no such thing.
When it comes to K. Rool's trailer, I dunno if Bowser or Dedede will show up, but I expect them to be featured with him in a PoTD or two, with Sakurai commenting about the Kings.