I haven't really seen any indication that it won't release in 2016, the fact that games are still being released for it doesn't make a whole lot of difference, it's not like everyone would just scrap every project they were already working on and throw money down the hole.
Besides; many are assuming that the biggest title of them all is actually cross-gen, I am one of those.
Almost all signs point towards an early release, 2016 is still the most reasonable guess in my opinion.
In 2006, they year when the PS3 released, for instance, the PS2 got games like Grandia III, Metal Gear Solid 3: Subsistence, Black (Criterion's first FPS), Onimusha: Dawn of Dreams, Tomb Raider Legend, GTA: Liberty City Stories, Dirge of Cerberus: FFVII, Okami, Bully, Final Fantasy XII, Socom: US Navy Seals Combined Assault.
The fact that games are still being released next year, even some big ones, doesn't prove anything. Like I said; they won't just cancel every project but it's likely that 2016 will be the last one with any proper support for the Wii U and I hardly think that anyone will start up any projects of any size for the platform from here on out, but they will finish the ones they're already invested in.