I will stick to the sets with minifigures, but the suitable number will most likely be 1.
LEGO Ninjago 2015 Sets – Official Images, Part 1
I have to admit I was never much of an Ninjago fan, but those sets look really good and underline how poorly designed the DC Comics Super Heroes sets are (not judging the minifigures though) .
LEGO Ninjago 2015 Sets – Official Images, Part 2
LEGO Speed Champions 2015 Sets – Official Images
Oh, I expected this line to be like the gas station promotion, which would have meant mostly small scale sets without minifigures. I was wrong. The cars look great (despite a lot of stickers) and achieve an accurate look with fairly simple techniques. I am already planning on getting one or two.
LEGO DC Comics Super Heroes: Justice League 2015 Sets – Official Images
Well, as most Super Heroes sets these are awesome for the same reason I run this blog: minifigures are amazing. The builds look decent, but somehow miss this certain something LEGO designers seem to put into the non-licensed lines. The thing I personally like the most is the Piaggio Ape from the Gorilla Grodd set.
The LEGO Movie 2015 Sets – Official Images
Small sets call for small prices and the minifigure ratio and assortment looks really great.