I haven't seen the plan, but my understanding is that it is the terrain off the Pony gates so yeah, I think it would be mainly a traverse trail at the bottom (and of course signage and maintenance). We'll see what happens. So far those in the know that I've talked to say that the Alterra takeover has generally been positive and that they are looking for investment options.
What I'd really like to see is a new lift from the mountain neighborhood area to Thunderhead to relieve the sometimes hellish Gondi lines in the morning, but that's not in the plan.