It depends on what the new relic quest is like, and how many phases of relic weapons we go through. Your source is from E3, and a month after that Yoshida wasn't sure if the new relic would be at the launch of 3.1 or later, such as 3.15

I kind of expect we will see something in 3.1 that is relatively simple to obtain, and a grindy upgrade process in 3.15. So maybe they start at 200, and then build up to 210.

I was surprised the Alex weapons weren't 215 to begin with, and I highly doubt they will add 215 relics without buffing the alex weapons first. Relic weapons tend to lag behind other weapons in terms of ilevel, before being boosted to match.