Well, if you even want the widebody to be the air by 2025 (whether in service or prototype) you should start the preliminary talks at this stage, even if it's a Il-96 derivative.
they wanted all the IP and production in china. russians don't have the funding.
russians have some twine-engine wide body preliminary sketch designs derived from IL96 but very behind (from west) in terms of flight control technology and system integration... not to say comac is any better, prob worse.
doing preliminary sketch designs on paper is prob easiest part.
realistically if a wide body would ever be off the ground C919 has to be somewhat commercially successful first, before comac can convince any one to get funding, that's the key to everything. comac is underpressure to get it done on ARJ21 and show substantial progress on C919 before gov't will shell out any more funding.
C919 w its latest delays, is looking at 2015 first flight date (may be) and a 202X EIS date... so if you do the math wide body wouldnt be until 202X at least for first flight.
anyway oddly enough if you look at who actually fund the damn thing. gov't of shanghai is actually a huge silent share holder. holding company, land etc. the office whose in charge of wide body right now is in Beijing (bunch of novices academics w no program experiences) , but the wide bodies may actually be design and/or build in shanghai.