Derrick J. Wyatt made several further statements to corroborate this, expanding on what was known from the Original Series, such as the backstories for the Biomnitrix and Kevin Levin invoking the plotlines of Ben 10,000[DJW 8] and Ken 10[DJW 9] respectively, the defining tragedy in Ben 10,000's life having now occurred at the age of 20,[DJW 10] "shifted" from the original age of 15,[pop-up 1][1] etc.
The writing of the show also explicitly called this out, such as when Ben identified the future Dr. Animo in Animo Crackers as the same person who he encountered in Ben 10,000,[2] and other efforts were made throughout the last few seasons to align the story with the original future timeline, in terms of character designs, set designs and plot lines.
This is evidenced in-show in Omniverse by the fact that both the Ben 10,000[3][4] and the future Dr. Animo[2] recalled characters and events from the present day. Chrono-Spanner also frequently visits present day with effects of his actions manifest in his present.[5] This would not be possible if these characters belonged to an alternate timeline.
It was pointed out by fans that this created a plot hole with the Original Series, as Ben 10,000 was from an alternate timeline[6][7][pop-up 2][8] in which he never travelled to the future when he was 10, and consequently did not give Max a cake on his 60th birthday, while Ben Prime did.[1] Thus, Ben 10,000 did not recall the events of the episode from his younger self's perspective.[7][DM 2][DM 1][DM 3]
Derrick responded to the matter by saying: "Your 'plot holes' are irrelevant. Time isn't completely fixed, it's shifting. Events can be subtly altered. But Ben 10,000 is the future for the Ben Prime timeline."[DJW 4] Therefore, it is an unintentional retcon by the Omniverse crew.
Due to the logical inconsistency introduced by this retcon, the Wiki treats the Original Series and Omniverse versions of the character, and by extension, his timeline, separately.