Let's change how PvZ 2 ends, with this interesting idea!
Am I telling you to get rid of modern days? Of course not! I think it should stay, in fact that would be a key in the ending! So, without further or do, let's begin!
The ??? Stage
congradulations, you beat zomboss with his paradoxal army! But, a huge tremble occurs. It appears that destroying the army caused the true paradox. Everything is sucked into a singularity. You, crazy dave, and penny are left in a starry void. All terrified. You see debre of every existing world, and zombies not present. Your home becomes black, blue, and starry. And a sunflower appears. She is just like everything else in the void. She was able to speak, and mentioned that not all hope is lost! Finding the taco would bring everything back to normal. And out of nowhere, void zombies appear. To face an entire onslaught of void zombies in, get this, 4 part world!!! Thats right! 4 Parts!! With many plants and zombies in each one! Now, no sun comes from the skies... Thats hard, right?
once you beat level 72, you unlock the final fight. A void version of the zombot from pvz 1. He has multiple stages, (12 to be exact, starting on ???). Once you beat the ??? stage, he slams his arm to the ground, causing the screen to flash and the world to change. All plants get evaporated from your lawn, and your conveyer belt changes it's plants depending on the world. Until you reach modern day. It plays a tricked out, multi-stage influencing version of PvZ 1's zomboss music. Once you beat that, the void bot screams, and the screen turns white. Crazy dave sees the taco come flying out of it, and catches it. He eats it in one bite, and everything returns to normal. "So, that was fun!" Crazy dave says. "I guess so... But let's never-" penny tries to speak, but crazy dave interrupts "LETS DO IT AGAIN!!!". Penny screams "NNNOOOOOOOOO!!!!". Time travel noises can be heard...And the screen turns white, and then fades out. A spotlight appears, with a singing sunflower. (Possibly the one from PvZ 2 china). And she starts singing there's a zombie on your lawn. Each verse changing, as well as the corresponding map, instruments, and zombies. Then, once the 12 part song is over, the credits role. And it is finished with a big "Thank you for your support".
So, what do you think?