What are the interesting eggs in One Punch Superman?

1. If you carefully observe the book in his hand, you can see that it is Sun Man, an animation created by a teacher many years ago, but it was not serialized to the end. Perhaps a teacher also has some regrets, so he appeared in the animation "One Punch Superman".

2. The second egg appears on its cover.

Look at this cover: Saitama and Genos stroll among the people who buy food, an S-class hero sexy prisoner, and a dragon with a mysterious aura standing there with a proud face, a hungry wolf hiding under a big tree, and a police dog squatting on a stone howling at the sun; There are also walk-on gentlemen and lovely dimples in Power 100%. Is this a super big egg?

Many hidden eggs, that is, about some villains in the film, vaccine man and Bick devil, do they look alike? In addition to the mecha, Genos and Iron Man have similar weapons and equipment.