I want to say Fox's reign is over, but as a Fox main from Brawl, and from someone who was inches away from getting ranked in northern california. I dont want to say its over yet. In Brawl he was actually an extremely strong character who I actually think couldve been the cream of the crop. Top tier, and maybe even best character in the game with even match ups against Snake, Falco, Diddy Kong, Olimar, and EVEN Meta Knight. The only thing that held him back in Brawl were characters like Pikachu who had ridiculous chaingrabs on him that made him hard to pick up as he can get hard countered. However with the removal of chaingrabs, from what has been revealed so far, that alone has buffed him. He can't get chaingrabbed any more, and thus can go on the offensive. He doesn't have to play scared and can no go balls deep without fear.
He still has incredibly damaging combos which include converting to up tilt strings into grabs, or ending it with an upsmash for easy 0-56 combos. This was in BRAWL. With the addition of even MORE hitstun, he's sure to have even more devastating combos than his Brawl counterpart, and his Brawl counterpart had horrifying combos if you knew what to do. On top of that, with the addition of lag being added to airdodging, it is no longer safe for characters to airdodge out of an utilt strings so its easy to keep on the pressure, and to land even more hits. In fact Im positive its going to push past 56. We can probably even get 0-80 or even 0-90% combos with Fox. I'm sure of it.
Despite losing our laser options, his laser shouldnt be what makes him. Plus, there might be techniques to get around the nerfed laser as there are some that Im hoping have trickled in from Brawl. Even so, I dont think we shouldnt rely on the laser anymore, but the pure aggression that can be brought out from this character. He's one of the few characters left in the game with incredibly strong aerials and thus we should play to those strengths. He doesnt have a single aerial that's weak.
A new option that people should consider is his illusion in terms of approaching and should be thought of as more than an added recovery. It's going to be the new thing, I promise. I've already heard whispers from grapevine that there are new techniques involving illusion when it came to Falco as that was the new thing to do. These tricks were done by Tyrant, and M2K who are currently training right now. Just use your guys' heads when thinking about how to apply this move. The combination of not going into a dead fall, and being able to illusion cancel...Just please...Think about it.
On top of this, lets take into account the new blast zones for stages. With some of the stages, characters are living to much higher percents than they were before. Characters would live to higher percents than they did in brawl. However, Fox is still able to kill these characters at what is still considered to be low percent with his Upsmash. While his upsmash definitely wasnt the killer that it was in Brawl, being able to kill characters such as Jigglypuff at 73% with no DI, or Meta Knight at 83% with no DI, by Sm4sh standards, I believe the the new standard is going to be around the 110-120 mark for even the lighter characters. This is with me taking it to the extreme if we have to get the percents that high. However, with Fox, those percents are very very very reachable with the additional hitstun, and his ability to string together long, damaging combos with little effort...I can still say that he is still a killer.
In short...Have faith...Our moment to shine will come