This is not going to be added due to the fact that it does not have any wheels or treads, it’s too large and it falls under the Copyright Act of 1976.
If any Star Wars vehicle were to be added (which will not happen as previously stated), the only choices would be the IG-227 Hailfire Droid, NR-N99 Persuader Tank Droid, and HAVw A6 Juggernaut (Clone Turbo Tank)