For now only others who are part of the Platoon test group can be invited to join these pre-match groups, which are accessible through Battlelog. Platoons fully return 'soon'.
Many fans were dismayed to learn that DICE stripped out the ability to group up with friends before entering matches, and so the studio has been working to bring it back.
"Very soon, we will release Platoons on Battlelog for Battlefield 4 (details to be announced very soon), but we want to give early access to a smaller group of players to test certain parts of the system before a full rollout and get some even earlier feedback," a Battlelog producer.
"If you have been added to the list, you will need to log out and back in to Battlelog for Platoons to appear (you will see a tile on Home and also find it under the Soldier dropdown in the menu)."
They had invited others to submit their Origin IDs and existing Platoon names to be given an increased chance of being selected for the early testing but the thread has since been locked.
"Wow, thanks for all the amazing interest! I have now locked the thread as we have gotten more than enough applies. Please bear in mind that the early access will be for just a small amount of players, but it won't be for a long period, so everyone will be able to enjoy Platoons soon!"