It looks Really good... But... Time for an Upgrade
Let's Start with giving Spider-Man Boots (The Ones From the Spider-Man vs Doc Ock Set (Literally the Name)) and Sandman Pants (Garmadon Pants from the Lego Ninjago Movie Blind Bags) but let's not stop there, we're gonna do Sandman from now on
So I made Sandman Some Weapons, a Sword, a Hammer, and a Mace
Let's Give Sandman a Hand... No Literally, I made a Giant Hand IDK if he Did this In the Comics, But I'm basing it off of the Lego Marvel Superheroes Videogame
A 360 In case you wanna Build it
Here's what I used for the Bottom Base (Well some of it)
And Lastly I made Sandman a Mound/Prison (If you Want ito to be a Prison, It's Hollow Inside so It Can Be)
Another 360 In case you want to build it
The top (Underneath the Sandman piece that Came in this Set)
And the bottom
But yeah, I think I did Pretty Good with Sandman, Tell me what you think