I've just found a photo that probably you all know, but that I didn't noticed before:
That made me reflect about the several
elegant clothes that Indy wears in this incoming episode.
1. During the motorcycle chase he wears brown trousers with a grey jacket with red tie on.
2. In the teaching scene (you can see a little clip in the video from the official site that shows part of the shooting in New Haven) he wears a white shirt with subtle black stripes, without vest and without suspenders, with a dark red bowtie.
3. In the toast scene for the end of the production (in the "that's a wrap!" video) he wears bowtie on a light-blue shirt WITH suspenders.
4. In the photo above, he wears a kakhi dress with vest in the Henry Jones Sr. style.
That made me make some hypothesis.
The University scene must be at least two, set in two different days and probably set in two different Universities, one of whom surely is Marshall college. That depends from the fact that he cannot wear in the same scene contemporarily bowtie and normal tie.
We must also remind that there should be a train-station scene (the Essex scene, in the station renamed "Bedford"). That leads me to think that, if Indy must use a train in this movie, will not certainly be to go to South America, but to move from a town to another in Connecticut or in the U.S.A. It could b e that he goes from his Marshall College to Yale, where is colleague Jim Broadbent is, or something like that....
During the teaching scene he could have get off his vest and his jacket, so he could have remained just in his shirt, so the scene with the complete dress and the teaching one could be in the same contest.
But there should be at least a third scene: the one with suspenders on, since the shirt it's different: it's light-blue. Given that in that moment of the video, he's sorrounded by an elegant Shia (with tie too) and an also elegant John Hurt (differently from other clips where he seems in really dirty and wrecked clothes) I propend for the thesis that that could be the final scene, when we see all the characters gathered around in elegant clothes (an academic ceremony, a feast of "adieu" for Indy's retirement, a - God forbid! - wedding scene, Indy's promotion as chairman.... I don't know...).