My kids still obsessed with infinity war right so I whipped this up. Decided to play off Thanos turning people to dust, so half the heroes will disappear, half will remain.
Some people may not like the Thanos gif so frequently - I know my kids will get hyped up seeing it every time, but may be too repetitious for others so you can always delete it.
Haven't used it yet, so let me know if there are any issues. This was created in google slides, although I've attached it as ppt in case your school firewalls it - Seemed okay testing it but I can't guarantee there won't be quirks from the ppt conversion.
https://drive.google.com/open?id=1h6pf9MQCvv7r1s8x1AdOyQxb06arbkW7QJygtyBxZF4