Xeelee have to waste their time on these fools:
Borg
Species 8472
Forerunners
Federation of Planets
Klingons
Cardassians
Romulans
Precursors
Flood
Isaac Asimov's Galactic Empire
Dune Imperium
Asgard
Imperium
Galactic Empire
How fast do you think they stomp? 0.32 nanoseconds?
Here are some possibilities:
Dune-
1. Any active No-ship or foldspace ship in transit during the wipe in space-time would be outside space-time. So, some survive. Norma Cenva returns from another universe and transports the remnants to a secure universe to prepare a counter attack. (what counter attack, I haven't a clue) Result: an uphill battle with little chance of success... and that little chance is Norma Cenva. Origin Universe destroyed.
2. Leto II assured the survival of humanity with the scattering. Seeing that no-ships can jump universes, it would be fair to say that humanity from the Dune universe has populated countless universes and is beyond the scope of the Xeelee to destroy them. Result: origin universe destroyed but the golden path remains; Xeelee seek to accomplish an impossible task.
UFP-
1. Future Feds protected by their temporal shielding. Seeing that they lack any true ability to cross universes, they remain stuck. Result: Future Feds cry as their universe is wiped from existence while they are stuck in limbo until they can bridge the universal gap.
2. The Q may or may not have mercy on the Feds, depending on whether the continuum wants to risk challenging the Xeelee. Result: an indeterminate outcome.
3. The Xeelee decide to travel in time to just after the big bang and destroy the ST universe that way. When they get there, they are confronted by............... Guinan?!?!?!
Result: Xeelee inadvertently spare the ST universe because they spend the lifetime of that universe talking to Guinan.
Borg-
We are the Xeelee, resistance is pathetically futile. Result: The borg, collectively, are wiped away.
Romulans-
Romulus and Remus meet Fenrir. Result: Fall of Rome.
Cardassians-
... Result: ... (nothing witty to say.... who likes the cardassians anyway?)
Galactic Empire-
1. There is a distur... no, a big fucking hole in the Force! Result: George Lucas decides to make episodes iv-vi again because the Xeelee have wiped the original trilogy from his mind.
2. Xeelee destroy universe. Force draws everything into it as a last resort. Force is outside space-time. Result: An immaterial universe full of ghostly force apparitions. Xeelee consider that good enough.
Imperium- (I'm guessing from 40k)
1. Chaos mythology is completely true. Xeelee attack with whatever method.
The Gods tell them to GTFO of their universe. Result: Xeelee GTFO of there.
2. Chaos mythology isn't completely true. Xeelee attack with whatever method that is not the timetravel-bigbang method. Emperor forges an alliance with Chaos to combat the threat by using the Warp. Result: don't know enough specifics to posit an answer.
3. Chaos mythology isn't completely true. Big-Bang method used. Result: most likely wiped. Don't know if Emperor can influence temporal changes beyond freezing time for a short period.
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Question about this whole thing: So, have the Xeelee given an eviction notice or something, and is it really an alliance with the ability to prepare before the Xeelee act?