I actually want to see the Enclave return guns blazing at the NCR in revenge, burning down Shady Sands with Verti-Assault Teams as retribution for there extermination campaign in Navarro
I'm sorry, but I don't see this happening.
Navarro and Oil Rig are no more, Enclave has been wiped out in the East and it is suggested that Chicago part of their operation is hardly what Enclave used to be.
Furthermore, biggest Enclave members/supporters are now old people, dead, dying or ashamed of what they once did. Just look at Remnants in FNV. It's hard to assume that Enclave goes any better than that.
No, Enclave is dead. Returning them in any way aside from some abandoned base, old terminals containing data about them or some similar nod of their existence, and their eventual fall, would be over-stretching it like never before.
Besides, from a practical standpoint, returning Enclave to the series is a very bad, counterproductive move. Not only would we prevent ourselves from potentially having another original faction in the game, we would just be asking for a same, watered-down drink more and more.
I don't understand why people have such a hard time leaving Enclave behind. No one complains that there is no Unity, for example. Why is clinging to same old thing so necessary? Is it obligatory that every new Fallout game contains Mutants/Enclave/BoS etc.?
Enclave's already become an absolutely bland, "evil" faction (if it has ever been anything else than that), that has little space for innovation, and should be buried behind. Similar goes for many other factions, organizations and what not. The wasteland is big, there is much out there to explore.
I, for one, find it very satisfying, even comforting so, that Enclave is just another radioactive ruin among the wastes.