Well no. Donkey Kong as a character was definitely lacking in development and attention by Nintendo having to rely on appearances in Mario Tennis, Golf and Kart so to let people remember who he is. It did great things for Diddy though. But he hasn't been in a Mario sport spinoff in a while. Or at least, a major one.
It's just that DK's universe is FAR LESS egocentric than say, Mario's. In the Mario universe, everything is about Mario. Peach, Yoshi, Luigi and Bowser are all important, but they all have their fixed roles, and hardly sway from them (except for Luigi). Mario is always the main hero. And perhaps there is a hidden Luigi mode.
In DKC, all the Kongs who where playable are on a equal foot, except Kiddy Kong (nobody loves him). But mainly Diddy and Dixie where the main heroes of the DKC triology, being playable the most of all Kongs. Diddy returned in DK64 however while Dixie didn't, and he even got his very own spin off title, Diddy Kong Racing. He established himself as a 100% equal to Donkey Kong quite swiftly from that point. His biggest miss was being excluded from Melee. Ever since then, it took a while before we saw him again (outside of remakes). His noticable biggest roles being in Mario Kart Double Dash, Golf Toadstool Tour, and Power Tennis. He was absent in Jungle Beat, which the biggest cluster**** in the DK universe ever, but luckily returned in DK: King of Swing. As a playable character in he Multiplayer Mode, but most importantly: the only of those characters to get his own mode in 1 Player mode, Diddy Mode.
Unfortunately, this is till today still his biggest role in a Donkey Kong game ever since DK64. Which is a sad thing. Ever since DK64, his role has decreased over time. And honestly, if he wasn't in Brawl, I would've boycotted Smash and Nintendo by now. I'm saddened by Nintendo's approach to the character. Especially since Rare would likely have had plenty of plans for him (seeing how they also planned to make Diddy Kong Pilot- a Diddy Kong title game with DK playable in it).
Anyway, am hoping Retro is willing to bring back absolutely everything I loved about DKC. They did a good thing by adding David Wise as a componist, underwater levels, and Dixie as a playable character. And adding elements as plucking and throwing are of coarse also welcome. But I still wanna switch between main characters. Have the Kongs throw each other. See more Animal Buddies back again. And see more helper Kongs. Not to speak of: the Kremlings. Even though I'm now equally upset about not being able to choose your main Kong at this point.
*insert BitF comic here of Old Diddy Kong rambling about loving it to tag between him and Cranky with handslaps*