guess i’ll reply seems kinda rude to leave a brutha hangin. Some of the drawings have potential, the sharpie doesn’t do anything justice. Sharpie makes everything look cartoony. Stick with a pencil. This will allow you to add more detail an shading to add depth. Looks like you obviously took some time to draw this stuff up. If your plannin on gettin sleeved i’d say give these to your artist and tell em to sort out good bad an add his own spin ect an see what he comes up with

but i do know what goes good with aliens (in my own opinion) is bio mechanical, use like metalic hose/pipes to make background (in black an grey btw)