User blog comment:Thailog/Ep. 207 "Depths" discussion/@comment-432124-20120609222118/@comment-34954086-20120614144634

No no i get why other time travellers would be necessary from a logical, meta-physical, but to me adding Impulse wasnt really needed to create a good story for invasion, they dont need time travelling brats to make alien invasions work. But by adding him, they've screwed the story more then if they had just used a filler episode, because in addition to: 1)Introduction episode which due to added focus to impulse made a plotline leftover from Season 1 rushed through the subplot so we didnt see half of it, 2) Duplication of Powers with a character more people like, 3)Later episodes that will focus on him instead of more interesting characters like the newer heroes and explaining what happened in the past 5 years, BUT it also will need to introduce additional characters (even for a moment) and spend more valuable runtime on these characters fixing or helping fix the timeline because of a logic fail CAUSED by Impulse.

Hence to me, it makes more sense if they were to cut their losses on impulse, fix the timestream with a deux ex machina smuggled in his broken timemachine, be done with him until a later season. they wouldnt need to spend alot of time on the other timetravellers, but they cant be so short to be cameos, so at minimum they're the rosebud of the subplot, which would without Impulse would be free to use to elaborate on other characters.