While I am all for return of MagSafe and SD slot, I hope new MacBook Pros aren't merely return to the past.
For instance, I want to see improved MagSafe design. Old MagSafe connector tends to fray and leave marks on the connector.
If function key row is coming back, perhaps some of the keys can retain Touch Bar-style display to indicate the state (e.g., volume) and programmability?
Apple Pencil support?
True 2x retina screen at default resolution?
Apple designed USB-C hub?
Apple designed external display?