Not nit picking at all (because Xander Berkley would be a good RJ), but he's 59 years old in the real world.....compared to Plotnick, Corrigan etc who are 44/45?
I was 16 in 1988, and I'm 41 now. That's almost a 20 year split if they're talking 'young man at the barn' painting the face. If the sherrif is RJ (still not sure they would show pigeons in the church, his face going through the glass etc in the promo - KNOWING people would dissect every inch of that promo) - he couldn't have been the 'young man' at the barn in 1988.
Which means the young man wasn't RJ, but a witness etc?
Anyway, just thinking out loud. I would hope they resolve questions like this though - should Macallister be confirmed as RJ (still doubt it though)