Something I got to add
Could whatever September presentation that's rumored just be a Separate Smash Presentation?
It could be coincidental or not, but every "Last Character" that had been revealed in Smash since we started getting these elaborate reveals, were in a Smash focused presentation, rather than a regular Direct
Bowser Jr. and Duck Hunt were revealed in the 50 Fact extravasngatsa, Bayonetta (along with Corrin before) was revealed in the Final Smash Broadcast. Incineroar and Ken were revealed in the Final Smash Direct, Byleth was revealed in the Last FP1 Sakurai Presents
If we go by history, couldn't we get a Similar treatment here. This would especially be true if like the other Last Character reveals, CP11 is a character that is Most Associated with Nintendo in Some way, whether the character is Nintendo themselves or they have a Large appeal to Nintendo Fanbase already
At this point, the only difference between having CP11 be revealed in a Direct and having CP11 be revealed in a Separate presentation would just be delay in timing, and to be honest, Nintendo does not need Smash anymore to hype up their Directs. Smash Ultimate is on it's last character to reveal and the game is about to be 3 years old at this point, and Nintendo has very hype games in the upcoming future.