I have been hoping BLI will release the I1, they were all over the PRR system and vital to any PRR modeler. My contact at BLI emailed me about a month ago. He believes the H10 will be released in 2023, the J1 in 2024, and the I1 in 2025. The I1 is definitely in the works at BLI, but it is going to be a while.
I guess it doesn't make sense for them to release more than one PRR steam loco a year so that the SPF's and others can save up but It would be nice to get them sooner than 2025. I turned 62 this past summer and who knows how long is left!
I also really want a J1 (C&O T-1) but I'd rather they went in alphabetical order and did H10, I1 and then J1. The H's and I's would be more use for most people. I'm guessing that the H10 and J1 are farther along in tooling.
I'm really encouraged that they are putting out 3 well known steam locos in the Y6b, Big Boy and Reading T1 within a year or so from announcement.