Originally Posted by
Dispenser Of Truth
Exactly. The original Ultimates volume mentioned the Fantastic Four as an existing team, and in UFF volume 1, Reed's immediate response upon seeing a weird threat for the first time is "we should get the Ultimates!". And that's not counting the team-up book starring Spider-Man that had him encounter an "Ultimate Fantastic Four" years earlier that showed a very traditional version of the team. Or Peter's adventures as Spider-Man starting while he was 15 and ending shortly after his 16th birthday, even though the actual noted timeskips in his book (6 months later, 3 months later, etc.) are themselves almost if not in fact more than a year. Ultimate continuity was always screwy like that.