[quote=@Cyrania]

Except that with character crossovers, having a rough timeframe is useful so that we know by and large what's going on with those characters at that moment of interaction. And so we can then have events have ripple effects across the rest of the universe.

We're trying to be a new shared universe here. We may as well try not to fall onto Comic weaknesses as much a possible.
[/quote]

I can't speak for everyone, but I rather my crossovers be coordinated in advance. I wouldn't particularly welcome it if someone were to interject themselves in my plot without an invitation being extended first.

By which argument again, every post can more or less be in the present unless otherwise stated or previously coordinated.