get a lot of messages from fans on Twitter mentioning the references to TSCC in Genisys. Judging by what they say, there's too many uncanny similarities to make this just a coincidence.
Looks like you have not seen the movie by the time you wrote this. I'd say TSCC references are essential for the movie.
By the way I enjoyed the movie. I did not expect anything even close to the level of T1 and T2, so I just relaxed and had fun. Hopefully we'll get something serious after James Cameron and Josh Friedman finish with Avatar. Meanwhile I would rather have fun watching Genisys and it's sequels than simply spend years waiting.