Last time I was at WDW I saw a new Residence Inn under construction, and this is probably the one you're asking about. It's on the North side of I-4, just past exit 27, which is the LBV/Hotel Plaza exit. It's past Crossroads Center, and just about across I-4 from the new outlet mall on the South side of I-4. This is just a short distance from WDW Hotel Plaza (Hilton, Wyndham Palace, Courtyard, Grosvenors, etc) and Downtown Disney.
Also, there is a new complex called Marriott Village at I-4 exit 27, with a brand new Farifield Inn, Courtyard, and SpringHill Suites.