Musician Hugh Carswell has a blog - Journals from Jura. A recent post of his was 'Remote working with Steve Jansen'. It discusses how the two of them collaborated - this is the link:
http://ianson.wordpress.com/2011/05/18/ ... ve-jansen/
One bit jumps out - it mentions that Steve has been over in the US working with David in the Samadhi Sound studio. There is a photo of Steve's drums setup in the SamadhiSound studio. This is the key quote below:
By happy co-incidence around the same time Steve was in New Hampshire working with his brother at his Samadhisound Studio, so we were able to record all the live takes there.
The timing of the blog suggests that David and Steve must have been working together at some point this year

I can't think that it would be Steve's follow up to Slope. If David's involved with that it would more likely be through file sharing. It must surely be new Nine Horses work or possibly a new project for David? It might also be linked to the duets project with Joan Wasser? Maybe we really will hear another DS record with...gasp...drums!