word - Teapot Riddle no.19

Teapot Riddle no.19
Rules:
I have one word which has several (2 or more) meanings.
Each of the meanings is a teapot (first, second ...)
You try to figure out the word with my Hints.

First Hint

It's dark when you see my first teapot
It get's dark when you see my second teapot

Second Hint

My first teapot has it's own superhero
My second teapot has more heros

Third Hint

My first teapot technique looks highly advanced
My second teapot technique looks pretty primitive

Final Hint

My first teapot has eyes, but known as blind
My second teapot has no eyes

Goodluck and have fun :)
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Answer

I think the answer is

Bat

It's dark when you see my first teapot

This is referring to the animal - a bat

It get's dark when you see my second teapot

This could when somebody hits you with a baseball bat.

My first teapot has it's own superhero

Batman

My second teapot has more heros

Baseball

My first teapot technique looks highly advanced

Bats look like complex creatures

My second teapot technique looks pretty primitive

A baseball bat looks like a pretty simple device

My first teapot has eyes, but known as blind

Blind as a bat

My second teapot has no eyes

Baseball bats do not have eyes