I think trying to make any connection at this point seems really futile though. Why even do it? Maybe it would work as a marketing ploy or something, but that doesn't sound that great. I guess if they really wanted to make a connection, they should've worked together from the start. At this point they should just remain completely separate since TSCC drove an intentional wedge between TV and movie continuity.
And while "T-800" may not have royalties associated with it (since they probably have rights to access anything from T1 and T2), I'm guessing that Project Angel definitely would.