How can I change the default Powershell host to new Windows Terminal?

I’m using the new Windows Terminal, which allows to run any of the existing Windows shells, like Powershell 5, 6, 7/Core.

Unfortunately that only works, if I start the new terminal first and then run any of the shells from in there.

What I’d like to do is run powershell.exe via startmenu / win+r and have it open inside the new Windows Terminal instead of the old console, but I couldn’t find any command line option for powershell.exe to enable that.

Is that even possible and if yes, how?