I'm actually unsure what's meant by reference here. But VP9/10 is the base codec on which AV1 is being built, but many of the most significant innovations from Daala are being folded into AV1.
Daala isn't dead and will continue to have value, at the very least as an experimental/development codec, but it may also form the base of a future static image format (it compares very well against JPG and HEVC/BPG.
This is comparison is over a year old so it's even better now: https://people.xiph.org/~jm/daala/revisiting/compare.html
I don't think it can move fully, since Daala is by design a different type of codec (using lapped transforms), while AV1 is more "classic" / block-DCT type of codec.
I.e. it makes sense to develop Daala further. Not sure what's going on in practice though. I guess it's better to ask Xiph / Mozilla.
We may return to Daala in the long term: it has competitive performance with HEVC on perceptual metrics despite a vastly simpler design than AV1 or even VP9, and despite being less mature than the classic block-based approaches and missing many tools that we simply didn't have a chance to implement (e.g., Daala has only basic MPEG2-style B-frames with no bi-prediction, as just one example).
Like the old adage says, if you have two baseball players who can run to first base in the same time, and one has perfect form while the other one looks lousy, which one do you pick? The guy with lousy form, because teach him the right form...
However, a lot of Daala's design is predicated on having a very constrained legal budget and not being able to rely on anyone else's patents. With the Alliance for Open Media, both of those constraints are relaxed. So even in the best case the result is likely to look pretty different from the way Daala looks today. Ultimately we're interested in making a codec people will actually use, and that means working with our partners.
Daala isn't dead and will continue to have value, at the very least as an experimental/development codec, but it may also form the base of a future static image format (it compares very well against JPG and HEVC/BPG. This is comparison is over a year old so it's even better now: https://people.xiph.org/~jm/daala/revisiting/compare.html