A well sourced analyst (Kuo) said both the MBA and the MBP would be refreshed in "Q2" which I believe ends in June. We all figured they would come out simultaneously, but that has not been the case. So now it really is just pure hope that Apple wanted to stagger the releases for some reason. Though with iOS 13.4 coming out today and tomorrow being the official launch day for last week's products, I honestly don't really see them announcing even more stuff at the same time, as much as I would like them to.
That leads me to figure they are probably at least waiting until WWDC which is early June to launch it. Notice that both products released last week, the refreshed MBA and the refreshed iPad Pro, don't involve major design changes or a new chassis. It's likely that Apple's production ramp up for an actually new design/chassis (the 14.1 MBP) was slightly delayed.
All that being said, fingers crossed for tomorrow! 😂