It begs to ask, "What is the purpose of a late night talk show or any other TV show"?
Some on these forums were questioning the wisdom of Disney+ as they were blinding themselves to the inexorable demise of broadcast/linear TV and all the 'cord cutting.'
It was mostly to score points against Disney.
Anyhoo, the last flickering light of broadcast/linear/cable TV was premised on the hope that live sports will keep legacy TV alive.
And now... live sports are alive and well on streaming. As well as live newscasts.
Some of us were pointing out the prescience of Iger for prioritizing streaming (even over parks!). Because, without streaming, Disney would be holding on to some dying TV channels and a losing a huge chunk of their revenue. For now, TV revenue is still profitable, but ever diminishing while streaming revue is increasing.
To get back to your question: In the end, there will be no "evening programming." Just shows taped in the afternoon and released as soon as the editing is done.
Indeed some segments of the late night talk shows make it to YouTube even before it is "aired."