I've just brewed a pale ale using French Bierre de Garde yeast and Brett Trois, and I'll be interested in how the combination works with fruity flavours (it's been hopped with Ekuanot and Jester) so that might impact on my beer for this, but my current thinking is as follows.
Blackberry porter is a kind of obvious choice, so as I'm sure I won't be alone in that line of thinking (and given that there's a crop of things in virtually every hedgerow) I've decided to not do that.
I'm not 100 per cent with the idea of an elderberry-infused beer, because of the high tannin levels, so that's on the back burner.
A juniper berry saison does make sense in my mind, because of the spiciness it might add, but I don't know if the yeast profile would allow the juniper to shine.
I keep coming back to gooseberries, because I love them! A gooseberry saison would be simple enough, and I have a few Dupont strains in the fridge, but I also fancy trying to pair the gooseberries with a fruity yeast and some background zesty hops to try and deliver something fresh and tart. The fear is that the hops might dominate, which is a concern.
As I said, I'll wait and see how the WLP007/WLP644 blend tastes, and that might force my hand!