First, datamine:
looks like the next Grand Hero Battle will be Michalis. Flying Green/Axe. Get your Takumis ready. There's also apparently an Eliwood/Minerva banner in the works. That could be the "Battling Michalis" banner, or it could be something else, but it seems likely to be related to the Grand Hero Battle.
Second, the new banner is slightly interesting for a couple reasons.
1. Ninian is a Dragon Dancer. Dancers have some excellent niche uses (I use one to great effect in my Arena defense team), but can suffer from low stats. Dragons tend to have decent stats. Ninian could become a meta unit for that reason. It's also really hard to get Azura, and Olivia's not great without some feather investment, so Ninian being a summon focus could lead to a lot of people seeking her out.
2. Jaffar looks like he could be a monster in terms of team synergy. His Deathly Dagger inflicts -7 def & res after battle as well as doing an additional guaranteed 7 damage after battle... plus he has Threaten Speed AND Life and Death to jack his attack/speed even further.
I wasn't super hyped about this banner, so I went ahead and tried a few more pulls on the Battling Ursula banner before it went away last night. Sunk about 80 orbs into it and ended up with some trash (obviously) and some decent units:
3* Barst +HP/-Def (meh)
3* Barst +Spd/-Res (perfect, but trash character)
3* Bartre +Def/-HP (meh)
4* Catria +Atk/-Spd (bad, and I have my perfect Catria from prev. roll)
3* Corrin +HP/-Spd (-Spd makes Lucina, Nino, and Anna double her = trash)
5* Effie +HP/-Atk (not bad for a wall-Effie, just glad to have gotten her!)
3* Florina +Atk/-Res (see below, heh)
4* Florina +Atk/-Res (pretty good; +Spd might have been better)
3* Henry +Spd/-Def (Henry's natural speed is terrible, so this feels like a waste on him)
4* Henry +Res/-Atk (trash)
4* Jagen +HP/-Spd
3* Oboro with Neutral rolls (meh, Oboro is meh, and I have an army of Oboros)
3* Oboro +Res/-Def (meh)
4* Odin +Spd/-Res (perfect Odin)
4* Odin +HP/-Def (not bad, but nothing to write home about)
4* Sully +Atk/-Res (Perfect—first good mounted lance! Might have preferred Abel or Peri.)
So after 180 orbs, I managed to snag a 5* Nino a couple days ago and a 5* Effie last night, the two focus characters I actually wanted. I'd say that's a pretty resounding success for a free player.
I have 40 orbs left, and I'm debating continuing summoning on blue orbs for Ninian, Azura, Ephraim, and Robin, or sitting pat and accumulating until Tellius.