Barry remembers the Star Labs Hall because it led to him the idea of the Teams for their team ups every year.
91 Votes in Poll
I'm rewatching the Arrowverse and just saw the Invasion crossover. In the illusion Oliver, Diggle, Thea, Sara and Ray are put in by he Dominators I noticed a reference to Chicago Med. Thea says that it's a shame Tommy couldn't make it to the wedding and Malcolm mentions that he can't believe Tommy is a doctor now and is busy working in Chicago. This is a reference to Colin Donnell's role on the show Chicago Med as doctor Connor Rhodes. I never noticed this before and think it's really cool.
I mean Martin Stein didn’t tell them about 2 Episodes later. All they just did is grab pictures of speedsters from different Earths and Earth 1 Alternate Timeline, Since Barry is dealing Savitar at that Time. Like Why Oliver couldn’t ask the Legends about Prometheus Identity with Gideon.