I can't see Broco being there this year. As much as I would love them to be, I don't that its going to happen. They have small festivies here and there such as community. I feel they will play those this year and then come to R&L next year with a new album under their belt. Maybe third down on main stage or even headlining R1 stage. Either way, they deserve a good slot if they appear next year IMO.
With the 3rd announcement, not sure why people think another act is going be third on the Foos day on the main. Bit of a strange thought and if someone is announced for third down, ill be very surprised. I can't really think of who the TBC is so I'm a bit useless haha. Most probs someone like Giggs as already mentioned.