Track Archives, what kind(s) of tracks can they handle?

I am a Cubase (soon to be Nuendo) user but I am wondering about the featureset of Nuendo.

As per my Subject, is it possible to export track types such as Tempo and Time Signature, without having to export Steinberg Master Track (.smt) files?

I regularly export stems and import them into new projects for mixing and vocal overdubs, and with the Automated Dialog Replacement feature of Nuendo, I would like to keep the same Time Signature (and markers) if possible.

So is any of this possible at all now, or will it be possible in Nuendo 10?

Cheers all