The latest update during the results briefing is that they will refit some of the 737-800 NG next year (1st or 2nd quarter). How many we won’t know. And what route they are going to be deploy also not sure. So once refitted, MI will transfer 1 route each time to SQ I think.
And for the 737 MAX, maybe SQ is trying to negotiate to get out of the contract ? I think they might buy Airbus A320/321 Neo instead.