According to the UESP wiki's "Alduin's Bane" article, there's a known issue where the cutscene in the Merethic Era may fail to trigger or complete, leaving you stuck there.
If you encounter this problem, here are some potential solutions:
Try completing other quests and then returning to the Time-Wound.
Fast travel away from the area and then back again. A Reddit user reported that this simple action fixed the problem for them in a similar situation.
For PC players (not applicable to the Switch version), there are additional console command solutions:
- Open the console and use these two commands to move Alduin to the landing position:
prid 4377e
followed by moveto cda03
- Another possible fix, after getting stuck in the cutscene, is to open the console and type in
setstage mq206 32
. This should let you regain control of the camera and a dragon should land, enabling the cutscene to continue. You could also type setstage mq206 70
into the console to learn the Dragonrend shout directly, then type in setstage mq206 100
to end the cutscene and start fighting with Alduin.
Unfortunately, as the Nintendo Switch version doesn't have access to console commands, the options for fixing this bug are more limited. If the suggested non-console methods don't work, consider reloading an earlier save.