MGM executives plan to update city officials within 30 days on the Springfield casino project.
MGM said in a news release Wednesday there would be updates on historic preservation discussions, concepts for a new marquee, and developments in offsite housing.
Last month, MGM shook up city officials with a new design that eliminated a 25-story hotel from the $800 million project.
City Council President Mike Fenton said MGM has to sweeten the deal with the city, to get the council to OK the new plan.
"The city has to be given some other type of compensation to justify that kind of amendment," said Fenton.
MGM needs local and state approval for the updated design.
