So...we Have Discovered A Planet That Might Be Possible To Host Life!....
This is just a silly theoretical question....
But saying its exactly Earth like and we are going to colonise it(yes we can make it but no fuel on board to get back)
What will we make sure never reaches us and we leave behind?
Seriously though.... definitely politicians. We should be able to set up a committee of volunteers to run the place without handsomely lining someone's pocket for lying.
Wildwood, some politicians are happy to give their services for no reward other than the ability to foist their crackpot views on their unsuspectng victims.
Aren't you all missing the obvious?
If this new planet is exactly like Earth, then ALL these will already be there and you would have them to look forward to on your arrival - your own personal Room 101.