If you didn't already know, some good news.
I personally would love to use an I6 TT in a light A-body. Inline's do have good attributes and if designed right, like the 2JZ, they have unlimited potential.
Some things that makes the Stellantis' 6-er a bowl of sour grapes is that it replaces the Hemi in production vehicles. Bad. Also, more sour grapes is that it's TT version's crate motor price is going to be priced high.