I repeat. Moonbase teleportation. Alexander in general. People from the future travelling back in time to save someone from a particular fate. I'm not sure how this Nier stuff could be hard to swallow for anyone when the previous list doesn't even include the above-mentioned shenanigans from dragons and imma-rule-you wannabe-gods, or how we've had multiple tiers of content from other FF's entirely (all thanks to Omega, who arrived thanks to his own shenanigans, using more shenanigans to program those threats from completely different timelines re. Kefka, Ex-Death and so on, followed by Eden on the first, including a certain prince from XV getting teleported here for a spell), not to mention a visit from a creature that isn't even under the SE banner... And all of it is canon! The fact that some might be done in a more fun manner (such as the FF-in-FF stuff and MHW) doesn't detract from that.

However, we can point that out all day but the real pudding will be seeing how it ties in down the road. It will no doubt be more centric to Nier and its endings, whereas for us it's just another of those weird and wonderful encounters that the WoL always seems to just bump into during downtime from their own actual storyline plights.