[EmperorBooty]

Is Future Okabe the same Okabe that failed to save Kurisu the first time? If so, shouldn't there have been a timeline shift before, during, or after Suzuha and a traumatized Okabe traveled back in the time machine (he wouldn't have existed otherwise)? If not, how could Future Okabe have sent a video message across timelines? (Follow up: are Future Okabe and army Suzuha from the same timeline? If so, how could Suzuha have traveled across timelines? Should have been impossible for time machines.)

Did the timeline change after Okabe saves Kurisu in the TRUE END (I'm assuming it did since Suzuha disappeared on the time machine), and if so, why was Okabe hospitalized (only his mind should have traveled, so his wounds shouldn't exist anymore)?[B]

If not (aka timeline does not shift after he saves Kurisu), why would Suzuha have traveled back to prompt him to stop World War III (since that would not be necessary as the same timeline is already destined for utopia)? Basically if there is no timeline shift at the end, there's a contradiction since the actions of the future characters would not have made sense. (Future Okabe would be in the same timeline if it did not shift, but Future Okabe should not have a reason to build a time machine to save Kurisu since the present Okabe already saved Kurisu.) *These questions won't matter if timeline did shift, but there are still the contradictions above if it did.