Oh there was some talk about how old Matt McGinnis was when he died. I did some more research:

In the Justice League episode [i]"Epilogue"[/i] Terry is 31 when he confronts Amanda Waller about being the biological son of Bruce Wayne. Since we know that Matt is eight or nine years his brother's junior and in this RP he took on the mantle of Robin after learning about his brother's secret identity and his biological heritage Matt had to have been at least 22 when he became Robin and assuming the Titans were only a loose team for a couple months before his murder then he was also that age when he died. This is flexible by about a year, maybe two since we only have a rough estimate of Matt's age compared to Terry's.

Another question though, what's the time gap between Matt's death and the start of the RP? It mentions that Batman took down both Inque and Paxton Powers who is now in prison and given how long court proceedings can be drawn out (especially with a rich defendant) are we looking at a couple of months or like a year? I'm just wondering how well the team would be acquainted with one another and we'd also have to make allowances for that time in the age of our characters.