The thing is Katz already has rights to shows like Forensic Files through its prior programming agreement with Turner. The IP deal affects Escape and Justice Network since both pool some of their programming from the Court TV intellectual property that Katz/Scripps now owns; that would suggest that Justice Network may lose a lot of that content (with the possible exception of shows such as Most Shocking that continued to air first-run episodes after the cable channel's conversion to TruTV).
As far as the new Court TV being a replacement for Grit, I doubt that. It seemed to me that the removal of their action programming was more the result of a format shift, since its entire entertainment schedule - minus the two hours of overnight infomercials it (as well as Escape) added recently - now consists of westerns (compared to the mixed format of action, adventure and western series and films that existed for about the first three of years of Grit's existence). The only plausible scenarios is that Court TV will be either a format overhaul of Escape (which seems possible, even though they just acquired Law & Order and Boston Legal, since the cable Court TV did air reruns of scripted crime dramas towards the end of the format) or as an entirely new network (in which case, Escape could shift more toward scripted crime dramas and scripted and unscripted mystery programming, and away from true crime shows).
The affiliation deal with Tribune would probably result in duplication being dropped in a few markets, like Oklahoma City, where KAUT and KSBI both now carry Escape on one of their subchannels, as a result of Katz cutting a leasing agreement with Griffin Communications to ensure full-market coverage for all their networks (Bounce TV, Laff and, after KOKH-DT2 dropped it for Charge!, Grit had been relegated to LPTV coverage in the market before October 1). Assuming that the new Court TV is launched as a new network, KAUT would replace Escape with Court TV on its DT3 subchannel. If Court TV ends up being an overhaul of Escape, then the network duplication on KAUT-DT3 and KSBI-DT5 continues.