As much as she deserves it, Lokedi is in no way a lock right now. I think she'll likely be the reserve unless two of Kosgei, Jepchirchir, and Chepngetich have a bad day at London. Chepngetich is probably the least likely to be selected of them though I think, so if Chepngetich and only one of the other two does well next week, I could see it being a toss up between her and Lokedi.