Superman is beyond overdue for a modern reinvention. It can the traditional tone and story, but it must be presented in a modern way. This more than anything is why MOS broke out as much as its did on opening weekend just as SR flopped on opening weekend. No red trunks, give him bright colors and a tan, let him smile, and give it epic action.
A strong trailer or 2 and high RT score would 100% do wonders for this character, but there will be an initial wave of skepticism towards the project until then.