Thinking back to this aspect of the show, it's quite surprising to me that Omniverse went the most ham on the whole multiverse concept, and yet tried to establish the future shown in the Original Series as Ben's "true future".
Granted, that's not something that I buy into. One, the sequel shows did so much retconning that it was nonsensical to establish that the future shown in Omniverse is the same future from the Original Series. There's too many holes with that and no, the "time constantly shifting" excuse doesn't work. That is a dumb and lazy excuse there. Two, the whole point of the Ben 10,000 episode was that it changed Ben's future. Ben and Gwen experiencing that future was supposed to act as a warning to convince them NOT to go down that same path. While I do think it's good that Omniverse tried to be more like the Original Series, this is an example of Omniverse course correcting too much back to said original show.
I think it is smart for the Ben 10 Planet Wiki to call that out and address the issues with Omniverse's attempt to bring back the original future. Although, I also don't buy into Ben's future changing because he gave Max a cake. That's just something that I find to be dumb.