I don't think so personally. LOTTC seems to be more in the style of the 1987 version of DuckTales. See, for example, the fact that LOTTC's version of Scrooge looks a lot like DT87's version. Also, the Three Caballeros was Donald's college band in DT17, whereas they are a team of heroic adventurers in LOTTC, which doesn't seem to portray a college-aged Donald.

Good point!

I wish they were connected but they definitely are not