* ScheduleSlip: Several titles have fallen victim to this, including ''Ultimates'' during vol. 1, ''New Ultimates'', and ''Ultimate X''. ''Ultimate Wolverine Vs. Hulk'' takes the cake, with ''four years'' passing between issues 2 and 3.
* ShortLivedBigImpact: Compared to the original Marvel U's massive output, the Ultimate line is tiny (only fifteen years total, with no more than four regular titles at a time). Yet, nearly every Marvel adaptation since the line's launch owes ''something'' to its Ultimate version. ''Especially'' the Franchise/MarvelCinematicUniverse.
* WhatCouldHaveBeen: Originally, Creator/GrantMorrison was going to pen an Ultimate Universe adaptation of The Kree-Srull War, which would have revealed the enemies the Chitauri were fleeing from in The Ultimates Volume 1 as The Kree and that the original Super-Soldier serum was made by Kree Scientists (who had been in hiding on Earth) from Chitauri DNA. However, Morrison returned to DC and this mini-series and the plot-lines it planned to introduce were thus abandoned.
** Before Creator/JephLoeb came aboard, Creator/MarkMillar planned to follow up The Ultimates Volume 2 with an ongoing series titled Ultimate Avengers, which would have detailed the original Ultimates team (now called by their mainstream name of The Avengers) operating independent from SHIELD out of Stark's New York townhouse. Millar later recycled story ideas he had for this series into the actual Ultimate Avengers series he would later pen.