The biggest problem with a concept like time travel, particularly travelling both into the past and future, is that a pack such is that would require a huge budget in order for it to be fleshed out properly... two worlds (past and future), two sets of bb and cas (past and future), etc. And as we all know, EA seems to be keeping the purse strings very tight, limiting the dev team to what they're able to add into a pack.
Case in point: the recent Horse Ranch pack and its limited features.
As much as I would love something like a time travel pack, I just don't see how a time travel pack could be properly fleshed out with such a low budget allowance. Never mind 'properly fleshed out'.... I just don't see how such a pack could be made at all with how limited the packs seem to be getting these days?
