Think it might be a little premature to be saying that.
On the NSO side of things...
While we may not get all these games on the service, the earlier addition of the Game Boy and GBA apps for Switch gives more to hope for with DK content other than the expected DK64 on N64 NSO and maybe Diddy Kong Racing if lucky.
The GBA version of the DKC trilogy is the most doubtful since they're just ports of the original games already on SNES online with a little extra content (and the GBC version of DKC1 that many forget exists), but the DK Land games on Game Boy app would be a nice touch, and especially DK 94 which I haven't had access to in ages. A great DK game on its own that it feels was kinda overshadowed by the success of DKC, basically being a major extension of the DK arcade with far more levels beyond the original four. I didn't get King of Swing on GBA back in the day, so that could be interesting for me to experience too.
As usual though, it's the slow drip feed method; we had to wait a little while before we had the DKC trilogy on SNES online, but just a matter of time until some of the DK Game Boy stuff gets added.
Part of me is tired of being spoiled as a Metroid fan though while waiting longer for DK stuff. Apart from Metroid Prime Remastered which was a pleasant surprise (and now people are more eager to see Prime 2 and 3 get the same treatment before anything MP4 related surfaces, lol), already had Metroid Fusion to replay on Switch GBA recently. I guess the new people at Retro needed some prior Metroid experience before doing MP4, and what better way than to remaster the most successful one the studio had previously done? I hope the wait for any DK stuff (be it old games through NSO or a new title) isn't that much longer though, much as we're used to the wait by now... And yeah, is a shame still that we never got to see Retro's take on a 3rd DKC with the different possibilities there were for it, but again, can thank Kensuke Tanabe for failing to get Prime 4 off the ground on his own and having to go back to Retro for it, which out-prioritized whatever else they may have been doing with the influence Tanabe has.
Copium thought, but they may be waiting for the full effect of DK being re-popularized through Seth Rogan before putting out a bunch of DK stuff. The "fire DK" in the latest movie trailer was pretty hype with that said, apart from all the earlier Kong cameos and stuff. Mario's voice remains the only one that I hadn't come around to, while DK and everyone else's feels mostly right to me.
Life has kept me pretty busy otherwise which is mainly why I hadn't posted here in some months, but hope everyone's doing okay otherwise. On the earlier question about an animal buddy in a potential Dixie moveset, I agree that Squitter has been centralizing one for Dixie between DKC 2 and 3. While I was fine with Squitter in 2D sprite form, it would be something else seeing it in 3D for those that have arachnophobia, but the majority of non-Rambi animal friends not getting some kind of 3D model transition has still been arguably the worst sin in the series.