Perhaps it involves a love triangle within the Glee club members. One character is torn between two others, and their feelings develop in unexpected ways, which can be related to the idea of unexpected arrivals or changes as hinted by 'glad you came'.
There's a chance that the fanfiction might introduce an original character who becomes an important part of the Glee club. This new character could interact with the existing ones and change the dynamics, which would be in line with the 'glad you came' theme as they bring something new to the group.
In this fanfiction, there could be a plotline where the Glee club as a whole takes a chance on competing in a very different kind of competition. Instead of the usual show choir events, they enter a more international or avant - garde competition. This would force them to step out of their comfort zone, learn new styles of music and performance, and deal with a whole new set of judges and competitors. It would also test their friendships and teamwork as they face these new challenges together.
There could be a plot where the mermaid's existence in the Glee universe is a secret known only to a few members of the club. These members have to protect her identity while also helping her pursue her dreams in the club. For example, they might help her find a way to perform without revealing her tail, or they could help her understand human music better so she can contribute more to the club.
One interesting plotline could be them collaborating on a big musical number for a school competition. They might start off with different ideas but then combine their talents to create something amazing.
In some glee christmas dinner fanfiction, there could be a plot where two characters who have been at odds finally make amends during the dinner. Like Rachel and Santana. The warm and festive atmosphere of the Christmas dinner softens their hearts. There might also be a cooking competition among the members to see who can make the best Christmas dish for the dinner, which adds some fun and friendly rivalry to the story.
Another plotline might involve Wes helping Rachel overcome her stage fright in a different way than the other characters in Glee. He could introduce her to some unique relaxation techniques or a new performance approach that really changes her on - stage presence for the better.
One interesting plotline could be the protagonist's journey of self - discovery as they emerge from the darkness. They might face internal struggles like overcoming past traumas or fears that have held them back. Another could be the relationships they form along the way, perhaps with characters who help them navigate this new phase of their life.
One possible plotline could be Sam and Mercedes dealing with the reactions of their friends and family. Their friends might be shocked at first but then come around to support them. Another could be their struggle to balance their dreams, like Sam's music career and Mercedes' own aspirations, with the new responsibility of having a baby.
One possible plotline could be how Rachel and Finn deal with the reactions of their friends and family. Their friends in Glee club might be shocked at first but then rally around them for support.
A common and interesting plotline is their collaboration on a Broadway - style musical production. They could be the leads and have to work through their different acting and singing styles. Blaine might bring his charm and smooth vocal style while Rachel's more powerful and diva - like presence creates a contrast that they have to blend together for the success of the show.