Paul Walker's character Brain O' Connor will appear as a CGI effects in the approaching "Fast and Furious 8" that will be released on April 2017. Walker's character already made his goodbye in "Fast and Furious 7" in 2015.
Cody Walker, Paul Walker's brother has agreed to appear in future "Fast and Furious" movies. According to Comic Book, Cody Walker's name wasn't included in the official cast for "Fast and Furious 8".
Either Cody Walker will be acting as a stand in for Paul Walker's character, Brian O'Connor, or he's going to play his brother. There are still no major details on what Paul Walker's appearance relevant to the "Fast and Furious 8".
In addition to the cast of "Fast and Furious 8" are Charlize Theron and Scott Eastwood. Another report claims that "Straight Outta Compton" director F. Gary Gray has his specific reasons why he added new characters especially Scott Eastwood's.
One of the possible reasons why Scott Eastwood was chosen to be a part of "Fast and Furious 8" is not to replace Paul Walker but to fill in some spaces that he left. Eastwood also has a lot of resemblance to Paul Walker's facial appearance.
The major theme for the "Fast and Furious 8" is brotherhood. A report from Digital Spy also says that Eastwood will be playing a character that would join the government operative of Mr. Nobody played by Kurt Russell. They will be handing off a new assignment to Dominic Torretto and the squad.
Scott Eastwood might also play the long lost brother of Brain O' Connor as a twist in the "Fast and Furious 8". Eastwood's character is going to try to walk in his O' Connor's shoes. Since Mr. Nobody has so much information about everybody it might not be a coincidence why Eastwood's character will be hired.