Avengers- It All Begins Here -#0 (2015) Marvel Comics

1st cameo appearance of American Kaiju
1st appearance of Robert Maverick in one panel, later becomes the second Red Hulk
1st cameo team appearance of The Ultimates: Captain Marvel, Black Panther, Ms America Chavez, Spectrum, Blue Marvel
First mention of Qeng Enterprises, previously Qeng Dynasty in Ultron Forever #1 (2015)