Just found it, the new Lancer images are from this month issue (released today) of the Comptiq magazine, they publish the manga ぐだぐだエース(仮)"Gudaguda Ace (provisional)"
Details and some images from that link
Spoiler:
It seems this issue is the last chapter of the Gudaguda Ace (provisional) manga and the next series it's gonna be (need confirmation from this part) 帝都聖杯奇譚回顧録 昭和戦国絵巻 Imperial Capital Holy Grail Strange Story Memoirs -Showa Sengoku Picture Scroll- (?) (I know, a mouthfull)