I just wanted to add a couple of more info drops that I heard on the Kongversation over the last few years to give some more credence to what Hyle has said.
Regarding the Smash ballot, he mentioned that Nintendo of Japan was shocked by the overwhelming support K. Rool had. So much so, that apparently, K. Rool is now viewed as an integral part of the DK franchise, and probably will be the recurring villain from now on. Apparently Retro Studios even wanted to add K. Rool as a secret boss in the Tropical Freeze port on Switch, but was vetoed by Sakurai as he wanted K. Rool's big return to be in Smash - which was the right call. Retro then pivoted to making Funky Kong the selling point of Tropical Freeze on Switch. Here's a writeup of that from the Kremling Kampaigner:
https://smashboards.com/threads/news-how-fans-brought-back-k-rool.457451/
Also, Hyle mentioned that 2018 was "Phase 1" of bringing back DK as a juggernaut IP. In 2018 we received DKCTF on Switch, Mario + Rabbids: Donkey Kong Adventure DLC (which is half the length of the base game), and King K. Rool in Smash. I'm assuming Phase 1 was designed to give DK a solid presence on Switch while they went to work on his new game.
Phase 2 is where it gets interesting. Phase 2 is likely kicking off with the Mario movie, the launch of Super Nintendo World in Japan in 2024, and hopefully a game. I wouldn't be surprised if either the new game releases around the time of the park in 2024 or if a remastered DKCR comes out around that time since the park is based on the aesthetics of DKCR.
Also, it's very conspicuous that the last 3 Nintendo systems for NSO: N64, Game Boy, and GBA have a grand total of 0 DK games. Not even DK 94, which is debatably more of a Mario game. I feel like they're holding out on these games (DK64, Diddy Kong Racing, DKL 1-3, and King of Swing) until they're ready to push DK. Look how much they've been pushing Metroid after a long period of silence.
If you're wondering like I was why it took them so long to start "Phase 2", Hyle did mention on the Kongversation that Nintendo has been frustrated that it's taken this long to get DK back on track and "it wasn't supposed to take this long" were his exact words. A lot of that was probably due to development slowing down from the pandemic and trying to figure out the future direction of DK while making his series unique from Mario. Just some more insights as well as some hope for things to come.