Nick Fury should be in it. As the head of SHIELD, he would have an interest in Skye. He could be the one who discovers the truth about Skye being Coulson and May's daughter and then try to use her for his own purposes. This would put Coulson and May in a difficult position of having to protect Skye from Fury while also trying to figure out how to be a family.
One idea could be that Coulson and May had a secret relationship in the past and Skye was the result. They hid her away to protect her from the dangerous world they were in. As Skye grew up, she started to show signs of extraordinary abilities, which led to her being discovered by SHIELD. Coulson and May then had to face their past and decide how to be part of Skye's life while still protecting her.
There's a fanfic called 'Coulson and Skye: Partners in the Shadows'. This one delves deep into their characters. It shows how they support each other during difficult missions. The author does an amazing job of portraying their unique bond.
Grandpa Max would be a great addition. His experience and wisdom could be a guiding force for Gwen and Lemon. Also, Kevin Levin could be included. His powers and his complex relationship with Ben could add an interesting dynamic to the story. Another good character could be Rook. His loyalty and combat skills could be useful in any adventures that Gwen and Lemon get into.
Well, in addition to Coulson and May, there could be other characters from SHIELD that play important roles. For example, Fitz or Simmons might make an appearance. They could be helping Coulson and May in their post - Framework adventures, providing scientific expertise or moral support.
Goten would be a great addition. He could add some light - hearted moments and also show the family dynamic between him, Gohan and Chichi. His innocent and sometimes mischievous nature would contrast well with Gohan's more serious side.
Artemis could be a great addition. He could offer some wise advice and be a sort of mentor figure to them. His knowledge of the magical world could help the trio in their adventures.
Snowball is a great character to include. He adds an extra layer of conflict as he also has his own ambitions for world domination. Another good one could be the lab scientists. Their presence can add some mystery and backstory to Pinky and the Brain's situation. And Elmyra, she can bring chaos as she always does in the original show, disrupting Pinky and the Brain's carefully laid plans.
Fluttershy could also be included. Imagine a scenario where Trixie is trying to put on a big, bold magic show and Fluttershy's timidness contrasts with that. Twilight might be caught in the middle, trying to make sure Fluttershy doesn't get too scared and that Trixie doesn't feel like her show is being ruined.
Annabeth could be a great addition. She could bring her strategic mind to help Percy deal with Medusa. For instance, she might come up with a plan to use Medusa's own pride against her.
Korsak is an excellent character to include. His experience and loyalty to the team can contribute to the story. He can be a source of wisdom and support for Rizzoli and Isles during cases. Another good character could be Angela Rizzoli. Her motherly nature and her insights into Jane's life can create interesting sub - plots.