Sure. This video actually does something very similar to what you are trying to do (except you can pretend the death volume is your door that goes to next level).
The only odd thing about that video is the cast node off of the create widget. That shouldn’t be necessary because you can just pull the pin off of the create widget node. Also, if you plan to do other things with the screen that involve widgets, you may want to consider removing the widget from parent after the fade in and re-adding to the viewport right before you play the fade out at the door.
I just think widgets might be easier because, though I don’t do a lot of sequencer, I’m under the impression that you either need a camera and that sequence in every single level or you need to make it a mini-movie of some sort (in which case you can’t easily adjust how long the fade is). With widget, you can fade however long you want in however many situations you want and fade time is easily adjustable with just a single widget in your character.