Future Samsung devices under the GALAXY branding have just had an injection of new names as Samsung have just filed trademark applications for three more GALAXY devices with the United States Patent and Trademark Office (USPTO). The names in the filings were the GALAXY Lift, GALAXY Perx, and GALAXY Sire. Nothing else is known but the classification of them being under "Mobile telephones; Smartphones."
Samsung have filed trademark applications for quite a few new phones over the last few months, with January seeing the Joy and Fresh, and February seeing Awaken, Axiom, Heir and Rite. The latest three filings include GALAXY in their name, which would indicate the phones will be Android-based devices, the special names are the sort that would normally be reserved for a US-specific phone, as most international models keep their names if they stay intact.
On top of this, filing for trademark protection for a name is no guarantee we'll even see the devices, but we get to see the thought process and somewhat of a direction from Samsung. We should see at least a couple of these models released eventually.