Good news for Arashi fans, especially as this year has been much quieter on the release front compared to 2010, the group will be singing the theme song for the drama Sakurai Sho is starring in, Nazotoki wa Dinner no Ato de. The song is titled Meikyu Love Song.
Sanspo article. (Japanese only)
I think it's safe to say that this will most likely be the next single for the group as well and I would assume it will come out in November which is why it hasn't been solicited yet. So Arashi fans will probably want to saving up for a new release now.